Results 131 to 140 of about 1,994 (163)
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Clinoptilolite-Heulandite Nomenclature
Reviews in Mineralogy and Geochemistry, 2001Heulandite was first named in 1822 for the English mineral collector, J. H. Heuland (see Dana 1914, p. 574–576). Although it is typically found as macroscopic (commonly 0.2–2 cm in size) crystals in cavities in mafic igneous rocks and is volumetrically minor on the Earth’s surface, heulandite also occurs in larger amounts in some sedimentary deposits ...
D. L. Bish, J. M. Boak
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Characterization of modified clinoptilolite
Journal of Radioanalytical and Nuclear Chemistry Letters, 1992Samples of clinoptilolite were modified using insoluble hexacyanoferrate from aqueous solution. The modified samples were characterized by elemental analysis, powder X-ray diffraction, solid state NMR and vibrational spectroscopy. The sorption properties of modified clinoptilolite were studied, too.
J. Novosad, J. Jandl, J. D. Woollins
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Antiviral properties of clinoptilolite
Microporous and Mesoporous Materials, 2005The aim of this study was to evaluate the antiviral properties of clinoptilolite, a natural non-toxic zeolite. Herein, a fine powder of micronized zeolite (MZ) was obtained by tribomechanical micronization of natural clinoptilolite. Different viral suspensions were treated with MZ in concentrations ranging from 0.5 to 50 mg/ml.
Grce, Magdalena, Pavelić, Krešimir
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Clinoptilolite, paragenesis and stratigraphy
Sedimentology, 1977ABSTRACTClinoptilolite, a zeolite of the heulandite group, occurs commonly in sediments as an authigenic mineral. In the Middle Eocene of southern Israel, it constitutes from a few per cent up to 80 per cent of the insoluble residue of the chalks and limestones. It is associated with opal C‐T, montmorillonite and palygorskite.
YAACOV NATHAN, AKIVA FLEXER
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Industrial Sludge Solidification by Using Clinoptilolite
Journal of Environmental Science and Health, Part A, 2004The sludge from metal plating industry is generally considered as "hazardous waste" due to its toxic heavy metal content. Solidification/stabilization techniques which are applied as prior to landfill give good results for the disposal of especially inorganic sludges into the landfill in a safe manner.
Mustafa, Balkan, Günay, Kocasoy
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LOCAL ZEOLITE MINERAL (CLINOPTILOLITE) IN ENERGY SYSTEMS
Proceeding of Energy and the Environment, 1998, 20232nd Trabzon International Energy and Environment Symposium -- JUL 26-29, 1998 -- KARADENIZ TECH UNIV, TRABZON ...
Ozkan, FC, Ulku, S
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Journal of Hazardous Materials, 2011
The increasing demands for environmental protection and sustainable food production require an increase in the use of natural and non-toxic materials for agriculture. In this study, the feasibility of using surfactant-modified zeolite (SMZ) in comparison with zeolite clinoptilolite (Cp) application to reduce nitrate leaching and enhance crop growth was
Raheleh, Malekian +2 more
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The increasing demands for environmental protection and sustainable food production require an increase in the use of natural and non-toxic materials for agriculture. In this study, the feasibility of using surfactant-modified zeolite (SMZ) in comparison with zeolite clinoptilolite (Cp) application to reduce nitrate leaching and enhance crop growth was
Raheleh, Malekian +2 more
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Adsorption on Romanian natural clinoptilolite
Zeolites, 1983Abstract Adsorption of carbon dioxide, sulphur dioxide, ammonia, and nitric oxide from air, and of hydrogen sulphide from methane, on Romanian natural zeolite in natural and modified form, is reported. The adsorption capacities, at 20°C, in flow conditions for several partial pressures of pollutants and for different linear velocity of the gaseous ...
D. Axente, M. Abrudean, A. Bâldea
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Dielectric response in natural clinoptilolite
Conference Record of the 1996 IEEE International Symposium on Electrical Insulation, 2002Several samples of cation forms of the natural clinoptilolite from Tasajeras deposit were studied using dielectric spectrometry. The behaviour of the response was analyzed for different water contents and, for the calcium and sodium forms, it was investigated for several temperatures too.
A. Delgado +3 more
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Clinoptilolites for nitrogen/methane separation
Chemical Engineering Science, 2004Abstract Clinoptilolites, naturally occurring zeolites, currently used by nuclear industry for ion exchange and drying, were evaluated for the nitrogen/methane separation. Ion exchange of purified clinoptilolite was carried out individually with the cations Na + , Mg 2+ , Ca 2+ , K + and H + , and the adsorption isotherms and diffusion rates were ...
Ambalavanan Jayaraman +5 more
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